Topic/Type: 1.1 Space & astrophysical plasmas, Poster

Numerical Simulation of Magnetic Reconnection in 3D Geometry and the Catastrophe Theory

I. N. Inovenkov, E. Y. Echkina

Moscow State University Faculty of Computational Mathematics and Cybernetics, Moscow, Russia

Magnetic reconnection is a fundamental process in a magnetized plasma for changing the magnetic connectivity of plasma elements and for converting magnetic energy to plasma kinetic energy, heat and fast-particle energy. In Sun\'s atmosphere it is thought to play a key role in producing solar flares.

Here we numerically with a help of 3D-MHD code study the nonlinear evolution of magnetic field reconnection in 3D plasma configuration in the neighborhood of a critical point, when the perturbations are chosen as elementary catastrophes.

The special attention is devoted to the case of structurally unstable magnetic fields. The transformation of structurally unstable magnetic configurations in structurally stable ones is studied numerically and analytically in the frame of catastrophe theory